Electrostatic generator - single disc version
Simplified ES generator with added capacitors and flash
light (measured breakdown ~ 6.5 kV). Common 9V battery to power motor and turn the disc. The disc can also be turned by hand and the charge builds up very quickly.

Video: http://youtu.be/yXYd1l08RsY

The video was done a second time because in the first try there
was to much background light for the camera to capture the sparks. It's better now but still missing a lot - listen to the sound.

Designed and built within two days (weekend) and to be seen
as a draft version, this little machine produces a lot of current @ high voltage - always be careful!

More info will follow...

Additional Information - first part:
The blue wires are contacting the disc. Either thin lize wire or carbon fibre (better), the green wires end in close proximity to the disc and do not touch.

Connection:
blue/top/left - connected to aluminium plate directly behind
blue/bottom/left - connects to blue/top/right
blue/bottom/right - connected to aluminium plate directly behind
green wires are output - connected with capacitor legs, parallel is the flash light or spark gap (discharges bad for your ears)

backside plate added

What learned - slower is better. Hyperspeed as shown in the video is nonsense. A lot of loses through fine blue mesh all over the segments (seen in the dark). Next machine might be smaller - or not depends if this discharges can be reduced somehow.